Решите пожалуйста подробно: 5+4 целых 1/5 • (-1 4/7)= -5⅔:4¼-5⅓:⅞= 2 3/5 • 7/11+4...

Ответ:

$1)-1.6;\\\\2) -7\displaystyle\frac{3}{7}; \\\\3) \frac{51}{55}$

Пошаговое объяснение:

$First) 5+4\displaystyle\frac{1}{5} *(-1\frac{4}{7} )= 5+\frac{21}{5} *(-\frac{11}{7} )=\\\\\\=5-\frac{3*11}{5}=5-\frac{33}{5}=\frac{25-33}{5} =\frac{-8}{5} =\\\\=-1.6$

$Second)-5\displaystyle\frac{2}{3} :4\frac{1}{4} -5\frac{1}{3} :\frac{7}{8}\\\\\\ 1)-5 \frac{2}{3} :4\frac{1}{4}=\frac{-17}{3} :\frac{17}{4} =\frac{-17}{3} *\frac{4}{17}=-\frac{4}{3} \\\\\\2) 5\frac{1}{3}:\frac{7}{8} =\frac{16}{3} *\frac{8}{7} =\frac{128}{21} \\\\\\3) -\frac{4}{3} -\frac{128}{21} =-\frac{28-128}{21} =-\frac{156}{21} =-7\frac{9}{21} = -7\frac{3}{7}$

$Third)2\displaystyle\frac{3}{5} *\frac{7}{11} +4\frac{2}{11} :(-5\frac{3}{4} )\\\\\\1) 2\frac{3}{5} *\frac{7}{11} =\frac{13}{5} *\frac{7}{11} =\frac{91}{55} \\\\\\2) 4\frac{2}{11} :(-5\frac{3}{4} )=\frac{46}{11} *(-\frac{4}{23}) =-\frac{2*4}{11} =-\frac{8}{11} \\\\\\3) \frac{91}{55} -\frac{8}{11} =\frac{91-40}{55} =\frac{51}{55}$